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Investments (Tables) | 12 Months Ended
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Dec. 31, 2024
Investments |
Available-for-Sale Securities (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | Allowance | ​ | ​
​ | ​ | Amortized | ​ | unrealized | ​ | unrealized | ​ | for credit | ​ | ​
​ |  | cost (1) |  | gains |  | losses |  | loss |  | Fair value
​ | ​ | (in millions)
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fixed maturities, available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government and agencies | ​ | $ | 1,937.4 | ​ | $ | 0.2 | ​ | $ | 299.7 | ​ | $ | — | ​ | $ | 1,637.9
Non-U.S. governments | ​ |  | 567.3 | ​ |  | 12.9 | ​ |  | 84.5 | ​ |  | — | ​ |  | 495.7
States and political subdivisions | ​ |  | 7,207.8 | ​ |  | 10.4 | ​ |  | 1,141.7 | ​ |  | — | ​ |  | 6,076.5
Corporate | ​ |  | 38,911.1 | ​ |  | 509.9 | ​ |  | 3,699.9 | ​ |  | 18.5 | ​ |  | 35,702.6
Residential mortgage-backed pass-through securities | ​ |  | 3,881.3 | ​ |  | 8.7 | ​ |  | 215.8 | ​ |  | — | ​ |  | 3,674.2
Commercial mortgage-backed securities | ​ |  | 5,634.3 | ​ |  | 4.6 | ​ |  | 450.9 | ​ |  | — | ​ |  | 5,188.0
Collateralized debt obligations (2) | ​ |  | 6,518.7 | ​ |  | 48.0 | ​ |  | 6.3 | ​ |  | — | ​ |  | 6,560.4
Other debt obligations | ​ |  | 9,446.2 | ​ |  | 49.9 | ​ |  | 580.2 | ​ |  | 0.2 | ​ |  | 8,915.7
Total excluding portfolio layer method basis adjustment | ​ | ​ | 74,104.1 | ​ | ​ | 644.6 | ​ | ​ | 6,479.0 | ​ | ​ | 18.7 | ​ | ​ | 68,251.0
Unallocated portfolio layer method basis adjustment (3) | ​ | ​ | (55.7) | ​ | ​ | 55.7 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | —
Total fixed maturities, available-for-sale | ​ | $ | 74,048.4 | ​ | $ | 700.3 | ​ | $ | 6,479.0 | ​ | $ | 18.7 | ​ | $ | 68,251.0
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross | ​ | Gross | ​ | Allowance | ​ | ​
​ | ​ | Amortized | ​ | unrealized | ​ | unrealized | ​ | for credit | ​ | ​
​ | ​ | cost (1) | ​ | gains | ​ | losses | ​ | loss | ​ | Fair value
​ | ​ | (in millions)
December 31, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Fixed maturities, available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government and agencies | ​ | $ | 1,745.3 | ​ | $ | 19.3 | ​ | $ | 235.8 | ​ | $ | — | ​ | $ | 1,528.8
Non-U.S. governments | ​ |  | 550.3 | ​ |  | 17.3 | ​ |  | 59.7 | ​ |  | — | ​ |  | 507.9
States and political subdivisions | ​ |  | 7,566.4 | ​ |  | 44.3 | ​ |  | 933.9 | ​ |  | — | ​ |  | 6,676.8
Corporate | ​ |  | 38,431.3 | ​ |  | 578.5 | ​ |  | 3,195.2 | ​ |  | 4.6 | ​ |  | 35,810.0
Residential mortgage-backed pass-through securities | ​ |  | 3,199.7 | ​ |  | 26.0 | ​ |  | 164.6 | ​ |  | — | ​ |  | 3,061.1
Commercial mortgage-backed securities | ​ |  | 5,428.6 | ​ |  | 1.2 | ​ |  | 654.3 | ​ |  | — | ​ |  | 4,775.5
Collateralized debt obligations (2) | ​ |  | 5,386.0 | ​ |  | 44.9 | ​ |  | 27.2 | ​ |  | — | ​ |  | 5,403.7
Other debt obligations | ​ |  | 8,473.8 | ​ |  | 42.1 | ​ |  | 606.5 | ​ |  | 0.1 | ​ |  | 7,909.3
Total fixed maturities, available-for-sale | ​ | $ | 70,781.4 | ​ | $ | 773.6 | ​ | $ | 5,877.2 | ​ | $ | 4.7 | ​ | $ | 65,673.1
(1) | Amortized cost excludes accrued interest receivable of $647.3 million and $619.2 million as of December 31, 2024 and December 31, 2023, respectively.
(2) | Primarily consists of collateralized loan obligations backed by secured corporate loans.
(3) | Represents unallocated basis adjustments related to fair value hedges utilizing the portfolio layer method. See Note 5, Derivative Financial Instruments, for further details.
Fixed Maturities Available-for-Sale by Contractual Maturity (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | Amortized cost (1) |  | Fair value |
​ | ​ | (in millions) | ​
Due in one year or less | ​ | $ | 1,383.9 | ​ | $ | 1,386.9 | ​
Due after one year through five years | ​ | ​ | 8,931.7 | ​ | ​ | 8,760.2 | ​
Due after five years through ten years | ​ | ​ | 10,158.1 | ​ | ​ | 9,748.2 | ​
Due after ten years | ​ | ​ | 28,149.9 | ​ | ​ | 24,017.4 | ​
Subtotal | ​ | ​ | 48,623.6 | ​ | ​ | 43,912.7 | ​
Mortgage-backed and other asset-backed securities | ​ | ​ | 25,480.5 | ​ | ​ | 24,338.3 | ​
Total | ​ | $ | 74,104.1 | ​ | $ | 68,251.0 | ​
(1) | Excludes unallocated basis adjustments related to fair value hedges utilizing the portfolio layer method.
Net Investment Income (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, | ​
​ |  | 2024 |  | 2023 |  | 2022 |
​ | ​ | (in millions) | ​
Fixed maturities, available-for-sale | ​ | $ | 2,728.5 | ​ | $ | 2,508.9 | ​ | $ | 2,100.3 | ​
Fixed maturities, trading | ​ | ​ | 49.1 | ​ | ​ | 43.3 | ​ | ​ | 36.8 | ​
Equity securities | ​ | ​ | 68.2 | ​ | ​ | 66.3 | ​ | ​ | 8.9 | ​
Mortgage loans | ​ | ​ | 802.4 | ​ | ​ | 761.7 | ​ | ​ | 771.7 | ​
Real estate | ​ | ​ | 175.1 | ​ | ​ | 177.2 | ​ | ​ | 277.7 | ​
Policy loans | ​ | ​ | 44.1 | ​ | ​ | 41.3 | ​ | ​ | 36.5 | ​
Cash and cash equivalents | ​ | ​ | 267.1 | ​ | ​ | 196.6 | ​ | ​ | 57.4 | ​
Derivatives | ​ | ​ | 94.3 | ​ | ​ | 38.6 | ​ | ​ | 171.3 | ​
Other | ​ | ​ | 491.6 | ​ | ​ | 496.1 | ​ | ​ | 517.7 | ​
Total | ​ | ​ | 4,720.4 | ​ | ​ | 4,330.0 | ​ | ​ | 3,978.3 | ​
Investment expenses | ​ | ​ | (271.2) | ​ | ​ | (238.1) | ​ | ​ | (139.8) | ​
Net investment income | ​ | $ | 4,449.2 | ​ | $ | 4,091.9 | ​ | $ | 3,838.5 | ​
​
Net Realized Capital Gains and Losses (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, | ​
​ |  | 2024 |  | 2023 |  | 2022 |
​ | ​ | (in millions) | ​
Fixed maturities, available-for-sale: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Gross gains | ​ | $ | 13.1 | ​ | $ | 51.4 | ​ | $ | 41.5 | ​
Gross losses | ​ | ​ | (61.0) | ​ | ​ | (141.7) | ​ | ​ | (191.5) | ​
Net credit losses (1) | ​ | ​ | (21.7) | ​ | ​ | (26.2) | ​ | ​ | (8.9) | ​
Hedging, net (2) | ​ | ​ | (11.5) | ​ | ​ | 2.2 | ​ | ​ | (0.7) | ​
Fixed maturities, trading (3) | ​ | ​ | 1.6 | ​ | ​ | (8.6) | ​ | ​ | (13.4) | ​
Equity securities (4) | ​ | ​ | 128.4 | ​ | ​ | 64.0 | ​ | ​ | (171.9) | ​
Mortgage loans (5) | ​ | ​ | (101.3) | ​ | ​ | (134.5) | ​ | ​ | (74.6) | ​
Derivatives (2) | ​ | ​ | 14.9 | ​ | ​ | (34.1) | ​ | ​ | 237.0 | ​
Other | ​ | ​ | 10.2 | ​ | ​ | 155.3 | ​ | ​ | 0.4 | ​
Net realized capital losses | ​ | $ | (27.3) | ​ | $ | (72.2) | ​ | $ | (182.1) | ​
(1) | Includes credit sales, adjustments to the credit loss valuation allowance, write-offs and recoveries on available-for-sale securities.
(2) | The change in fair value of fixed maturities, available-for-sale and the change in fair value of derivative hedging instruments in fair value hedging relationships are reported in net investment income with the earnings effect of fixed maturities, available-for-sale. Gains (losses) for fixed maturities, available-for-sale related to terminated cash flow hedges continue to be reflected in net realized capital gains (losses).
(3) | Unrealized gains (losses) on fixed maturities, trading still held at the reporting date were $0.7 million, $(9.6) million and $(3.2) million for the years ended December 31, 2024, 2023 and 2022, respectively. This excludes $1.7 million, $2.9 million and $(16.6) million in unrealized gains (losses) for the years ended December 31, 2024, 2023 and 2022, respectively, that were reported in market risk benefit remeasurement (gain) loss and $2.0 million, $6.8 million and $(1.4) million of unrealized gains (losses) for the years ended December 31, 2024, 2023 and 2022, respectively, that were reported in net realized capital gains (losses) on funds withheld assets.
(4) | Unrealized gains (losses) on equity securities still held at the reporting date were $106.9 million, $73.4 million and $(117.1) million for the years ended December 31, 2024, 2023 and 2022, respectively. This excludes $37.9 million, $34.7 million and $(0.7) million of unrealized gains (losses) for the years ended December 31, 2024, 2023 and 2022, respectively, that were reported in net investment income and $0.0 million, $1.7 million and $(1.7) million of unrealized gains (losses) for the years ended December 31, 2024, 2023 and 2022, respectively, that were reported in net realized capital gains (losses) on funds withheld assets.
(5) | Net realized capital gains (losses) on mortgage loans include losses related to the deconsolidation of residential mortgage loan trusts in 2023 and 2022.
Allowance for credit loss (Tables) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2024
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | mortgage- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | backed | ​ | Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | U.S. | ​ | ​ | ​ | ​ | States and | ​ | ​ | ​ | ​ | pass- | ​ | mortgage- | ​ | Collateralized | ​ | Other | ​ | ​ | ​
​ | ​ | government | ​ | Non-U.S. | ​ | political | ​ | ​ | ​ | ​ | through | ​ | backed | ​ | debt | ​ | debt | ​ | ​ | ​
​ |  | and agencies |  | governments |  | subdivisions |  | Corporate |  | securities |  | securities |  | obligations (1) |  | obligations |  | Total
​ | ​ | (in millions)
Beginning balance | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 4.6 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 4.7
Additions for credit losses not previously recorded | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 16.1 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 0.1 | ​ | ​ | 16.2
Reductions for securities sold during the period | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3)
Write-offs charged against allowance | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1.6) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (1.6)
Foreign currency translation adjustment | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3)
Ending balance | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 18.5 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.2 | ​ | $ | 18.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accrued interest written off to net investment income | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 1.0 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 1.0
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2023
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | mortgage- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | backed | ​ | Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | U.S. | ​ | ​ | ​ | ​ | States and | ​ | ​ | ​ | ​ | pass- | ​ | mortgage- | ​ | Collateralized | ​ | Other | ​ | ​ | ​
​ | ​ | government | ​ | Non-U.S. | ​ | political | ​ | ​ | ​ | ​ | through | ​ | backed | ​ | debt | ​ | debt | ​ | ​ | ​
​ |  | and agencies |  | governments |  | subdivisions |  | Corporate |  | securities |  | securities |  | obligations (1) |  | obligations |  | Total
​ | ​ | (in millions)
Beginning balance | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 7.7 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 7.8
Additions for credit losses not previously recorded | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 8.2 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 8.2
Additional increases (decreases) for credit losses on securities with an allowance recorded in the previous period | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (7.5) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (7.5)
Write-offs charged against allowance | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (3.8) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (3.8)
Ending balance | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 4.6 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 4.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Accrued interest written off to net investment income | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2022
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Residential | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | mortgage- | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | backed | ​ | Commercial | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | U.S. | ​ | ​ | ​ | ​ | States and | ​ | ​ | ​ | ​ | pass- | ​ | mortgage- | ​ | Collateralized | ​ | Other | ​ | ​ | ​
​ | ​ | government | ​ | Non-U.S. | ​ | political | ​ | ​ | ​ | ​ | through | ​ | backed | ​ | debt | ​ | debt | ​ | ​ | ​
​ |  | and agencies |  | governments |  | subdivisions |  | Corporate |  | securities |  | securities |  | obligations (1) |  | obligations |  | Total
​ | ​ | (in millions)
Beginning balance | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 15.1 | ​ | $ | — | ​ | $ | 0.3 | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 15.5
Additions for credit losses not previously recorded | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 5.8 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 5.8
Reductions for securities sold during the period | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (8.7) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (8.7)
Additional increases (decreases) for credit losses on securities with an allowance recorded in the previous period | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (4.2) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (4.2)
Write-offs charged against allowance | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3)
Foreign currency translation adjustment | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.3)
Ending balance | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 7.7 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 7.8
(1) | Primarily consists of collateralized loan obligations backed by secured corporate loans.
Available-for-Sale Securities in Unrealized Loss Positions Without an Allowance for Credit Loss (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ | ​ | Less than | ​ | Greater than or | ​ | ​ | ​ | ​
​ |  | twelve months |  | equal to twelve months | ​ | Total
​ | ​ |  | ​ | Gross | ​ |  | ​ | Gross | ​ |  | ​ | Gross
​ | ​ | Fair | ​ | unrealized | ​ | Fair | ​ | unrealized | ​ | Fair | ​ | unrealized
​ |  | value |  | losses |  | value |  | losses |  | value |  | losses
​ | ​ | (in millions)
Fixed maturities, available-for-sale (1): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government and agencies | ​ | $ | 909.1 | ​ | $ | 17.4 | ​ | $ | 810.6 | ​ | $ | 283.1 | ​ | $ | 1,719.7 | ​ | $ | 300.5
Non-U.S. governments | ​ |  | 32.9 | ​ |  | 1.3 | ​ |  | 308.8 | ​ |  | 83.2 | ​ |  | 341.7 | ​ |  | 84.5
States and political subdivisions | ​ |  | 743.2 | ​ |  | 26.0 | ​ |  | 4,745.7 | ​ |  | 1,115.8 | ​ |  | 5,488.9 | ​ |  | 1,141.8
Corporate | ​ |  | 4,970.7 | ​ |  | 164.2 | ​ |  | 20,099.1 | ​ |  | 3,532.3 | ​ |  | 25,069.8 | ​ |  | 3,696.5
Residential mortgage-backed pass- through securities | ​ |  | 1,938.4 | ​ |  | 33.2 | ​ |  | 1,214.0 | ​ |  | 182.6 | ​ |  | 3,152.4 | ​ |  | 215.8
Commercial mortgage-backed securities | ​ |  | 691.7 | ​ |  | 8.2 | ​ |  | 3,860.1 | ​ |  | 442.6 | ​ |  | 4,551.8 | ​ |  | 450.8
Collateralized debt obligations (2) | ​ |  | 582.2 | ​ |  | 1.3 | ​ |  | 29.8 | ​ |  | 5.0 | ​ |  | 612.0 | ​ |  | 6.3
Other debt obligations | ​ |  | 1,732.5 | ​ |  | 21.8 | ​ |  | 3,698.5 | ​ |  | 557.2 | ​ |  | 5,431.0 | ​ |  | 579.0
Total fixed maturities, available-for-sale | ​ | $ | 11,600.7 | ​ | $ | 273.4 | ​ | $ | 34,766.6 | ​ | $ | 6,201.8 | ​ | $ | 46,367.3 | ​ | $ | 6,475.2
(1) | Fair value and gross unrealized losses are excluded for available-for-sale securities for which an allowance for credit loss has been recorded. Gross unrealized losses exclude unallocated basis adjustments related to fair value hedges utilizing the portfolio layer method.
(2) | Primarily consists of collateralized loan obligations backed by secured corporate loans.
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2023
​ | ​ | Less than | ​ | Greater than or | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | twelve months | ​ | equal to twelve months | ​ | Total
​ | ​ | ​ | ​ | ​ | Gross | ​ | ​ | ​ | ​ | Gross | ​ | ​ | ​ | ​ | Gross
​ | ​ | Fair | ​ | unrealized | ​ | Fair | ​ | unrealized | ​ | Fair | ​ | unrealized
​ | ​ | value |  | losses |  | value |  | losses |  | value |  | losses
​ |  | (in millions)
Fixed maturities, available-for-sale (1): | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
U.S. government and agencies | ​ | $ | 316.4 | ​ | $ | 3.1 | ​ | $ | 997.1 | ​ | $ | 232.6 | ​ | $ | 1,313.5 | ​ | $ | 235.7
Non-U.S. governments | ​ | ​ | 41.9 | ​ | ​ | 1.7 | ​ | ​ | 331.3 | ​ | ​ | 57.9 | ​ | ​ | 373.2 | ​ | ​ | 59.6
States and political subdivisions | ​ | ​ | 596.6 | ​ | ​ | 19.0 | ​ | ​ | 5,075.1 | ​ | ​ | 914.8 | ​ | ​ | 5,671.7 | ​ | ​ | 933.8
Corporate | ​ | ​ | 3,210.1 | ​ | ​ | 126.9 | ​ | ​ | 22,929.1 | ​ | ​ | 3,064.4 | ​ | ​ | 26,139.2 | ​ | ​ | 3,191.3
Residential mortgage-backed pass-through securities | ​ | ​ | 633.0 | ​ | ​ | 4.9 | ​ | ​ | 1,275.6 | ​ | ​ | 159.7 | ​ | ​ | 1,908.6 | ​ | ​ | 164.6
Commercial mortgage-backed securities | ​ | ​ | 280.3 | ​ | ​ | 4.1 | ​ | ​ | 4,192.4 | ​ | ​ | 650.1 | ​ | ​ | 4,472.7 | ​ | ​ | 654.2
Collateralized debt obligations (2) | ​ | ​ | 405.6 | ​ | ​ | 1.8 | ​ | ​ | 2,301.6 | ​ | ​ | 25.4 | ​ | ​ | 2,707.2 | ​ | ​ | 27.2
Other debt obligations | ​ | ​ | 1,183.7 | ​ | ​ | 18.5 | ​ | ​ | 4,408.8 | ​ | ​ | 588.0 | ​ | ​ | 5,592.5 | ​ | ​ | 606.5
Total fixed maturities, available-for-sale | ​ | $ | 6,667.6 | ​ | $ | 180.0 | ​ | $ | 41,511.0 | ​ | $ | 5,692.9 | ​ | $ | 48,178.6 | ​ | $ | 5,872.9
(1) | Fair value and gross unrealized losses are excluded for available-for-sale securities for which an allowance for credit loss has been recorded.
(2) | Primarily consists of collateralized loan obligations backed by secured corporate loans.
Net Unrealized Gains and Losses on Available-for-Sale Securities and Derivative Instruments (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2024 |  | December 31, 2023 |
​ | ​ | (in millions) | ​
Net unrealized losses on fixed maturities, available-for-sale (1) | ​ | $ | (5,942.5) | ​ | $ | (5,143.0) | ​
Net unrealized gains (losses) on derivative instruments | ​ | ​ | 66.1 | ​ | ​ | (1.6) | ​
Adjustments for assumed changes in amortization patterns | ​ | ​ | 5.1 | ​ | ​ | (5.2) | ​
Adjustments for assumed changes in policyholder liabilities | ​ | ​ | 12.2 | ​ | ​ | 1.4 | ​
Net unrealized gains (losses) on other investments and noncontrolling interest adjustments | ​ | ​ | (52.5) | ​ | ​ | 43.1 | ​
Provision for deferred income tax benefits | ​ | ​ | 1,270.5 | ​ | ​ | 1,088.4 | ​
Net unrealized losses on available-for-sale securities and derivative instruments | ​ | $ | (4,641.1) | ​ | $ | (4,016.9) | ​
(1) | Excludes net unrealized gains (losses) on fixed maturities, available-for-sale included in fair value hedging relationships.
Financing Receivable Credit Quality Indicators (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ |  | 2024 |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | Prior |  | Total
​ | ​ | ​ | (in millions)
Commercial mortgage loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
A- and above | ​ | $ | 1,182.1 | ​ | $ | 793.1 | ​ | $ | 1,234.3 | ​ | $ | 2,101.3 | ​ | $ | 1,463.4 | ​ | $ | 6,594.0 | ​ | $ | 13,368.2
BBB+ thru BBB- | ​ | ​ | 210.0 | ​ | ​ | 393.6 | ​ | ​ | 231.6 | ​ | ​ | 269.1 | ​ | ​ | 180.6 | ​ | ​ | 1,217.5 | ​ | ​ | 2,502.4
BB+ thru BB- | ​ | ​ | 215.7 | ​ | ​ | 143.4 | ​ | ​ | 154.3 | ​ | ​ | 47.9 | ​ | ​ | 40.1 | ​ | ​ | 271.7 | ​ | ​ | 873.1
B+ and below | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2.5 | ​ | ​ | 326.5 | ​ | ​ | 329.0
Total | ​ | $ | 1,607.8 | ​ | $ | 1,330.1 | ​ | $ | 1,620.2 | ​ | $ | 2,418.3 | ​ | $ | 1,686.6 | ​ | $ | 8,409.7 | ​ | $ | 17,072.7
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Direct financing leases: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
A- and above | ​ | $ | 1.0 | ​ | $ | — | ​ | $ | 38.5 | ​ | $ | 11.0 | ​ | $ | 33.8 | ​ | $ | 177.4 | ​ | $ | 261.7
BBB+ thru BBB- | ​ | ​ | 4.9 | ​ | ​ | 1.8 | ​ | ​ | 87.3 | ​ | ​ | 19.0 | ​ | ​ | 52.8 | ​ | ​ | 67.0 | ​ | ​ | 232.8
BB+ thru BB- | ​ | ​ | 38.8 | ​ | ​ | — | ​ | ​ | 0.5 | ​ | ​ | 6.8 | ​ | ​ | 3.4 | ​ | ​ | 8.5 | ​ | ​ | 58.0
B+ and below | ​ | ​ | 3.6 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 6.9 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 10.5
Total | ​ | $ | 48.3 | ​ | $ | 1.8 | ​ | $ | 126.3 | ​ | $ | 43.7 | ​ | $ | 90.0 | ​ | $ | 252.9 | ​ | $ | 563.0
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Performing | ​ | $ | 350.4 | ​ | $ | 411.5 | ​ | $ | 970.3 | ​ | $ | 1,234.9 | ​ | $ | 196.0 | ​ | $ | 427.6 | ​ | $ | 3,590.7
Non-performing | ​ | ​ | 0.5 | ​ | ​ | 5.5 | ​ | ​ | 6.1 | ​ | ​ | 4.8 | ​ | ​ | 2.5 | ​ | ​ | 5.7 | ​ | ​ | 25.1
Total excluding portfolio layer method basis adjustments | ​ | $ | 350.9 | ​ | $ | 417.0 | ​ | $ | 976.4 | ​ | $ | 1,239.7 | ​ | $ | 198.5 | ​ | $ | 433.3 | ​ | ​ | 3,615.8
Unallocated portfolio layer method basis adjustment (1) | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | (8.4)
Total | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 3,607.4
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Performing | ​ | $ | 84.2 | ​ | $ | 61.9 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 146.1
Non-performing | ​ | ​ | 0.1 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 0.1 | ​ | ​ | 0.2
Total | ​ | $ | 84.3 | ​ | $ | 61.9 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 146.3
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reinsurance recoverable and deposit receivable | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 19,493.4
​ ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023
​ |  | 2023 |  | 2022 |  | 2021 |  | 2020 |  | 2019 |  | Prior |  | Total
​ | ​ | ​ | (in millions)
Commercial mortgage loans: |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |  |  | ​ |
A- and above | ​ | $ | 664.8 | ​ | $ | 1,277.1 | ​ | $ | 2,364.0 | ​ | $ | 1,587.3 | ​ | $ | 1,954.4 | ​ | $ | 5,576.6 | ​ | $ | 13,424.2
BBB+ thru BBB- | ​ | ​ | 282.4 | ​ | ​ | 356.0 | ​ | ​ | 374.8 | ​ | ​ | 212.0 | ​ | ​ | 337.3 | ​ | ​ | 911.7 | ​ | ​ | 2,474.2
BB+ thru BB- | ​ | ​ | 110.5 | ​ | ​ | 142.2 | ​ | ​ | 16.7 | ​ | ​ | 2.7 | ​ | ​ | 35.2 | ​ | ​ | 234.2 | ​ | ​ | 541.5
B+ and below | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 83.4 | ​ | ​ | 58.5 | ​ | ​ | 141.9
Total | ​ | $ | 1,057.7 | ​ | $ | 1,775.3 | ​ | $ | 2,755.5 | ​ | $ | 1,802.0 | ​ | $ | 2,410.3 | ​ | $ | 6,781.0 | ​ | $ | 16,581.8
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Direct financing leases: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
A- and above | ​ | $ | 1.1 | ​ | $ | 122.0 | ​ | $ | 12.4 | ​ | $ | 56.7 | ​ | $ | 1.3 | ​ | $ | 207.3 | ​ | $ | 400.8
BBB+ thru BBB- | ​ | ​ | 2.8 | ​ | ​ | 23.5 | ​ | ​ | 20.8 | ​ | ​ | 46.9 | ​ | ​ | 11.6 | ​ | ​ | 76.3 | ​ | ​ | 181.9
BB+ thru BB- | ​ | ​ | 42.2 | ​ | ​ | — | ​ | ​ | 15.6 | ​ | ​ | 8.0 | ​ | ​ | — | ​ | ​ | 1.6 | ​ | ​ | 67.4
Total | ​ | $ | 46.1 | ​ | $ | 145.5 | ​ | $ | 48.8 | ​ | $ | 111.6 | ​ | $ | 12.9 | ​ | $ | 285.2 | ​ | $ | 650.1
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Residential mortgage loans: |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Performing | ​ | $ | 502.3 | ​ | $ | 1,064.3 | ​ | $ | 1,341.8 | ​ | $ | 228.4 | ​ | $ | 120.8 | ​ | $ | 421.0 | ​ | $ | 3,678.6
Non-performing | ​ | ​ | 1.1 | ​ | ​ | 4.0 | ​ | ​ | 4.9 | ​ | ​ | 1.3 | ​ | ​ | 2.0 | ​ | ​ | 4.6 | ​ | ​ | 17.9
Total | ​ | $ | 503.4 | ​ | $ | 1,068.3 | ​ | $ | 1,346.7 | ​ | $ | 229.7 | ​ | $ | 122.8 | ​ | $ | 425.6 | ​ | $ | 3,696.5
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Other loans: | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Performing | ​ | $ | 168.5 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 168.5
Non-performing | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 0.1 | ​ | ​ | 0.1
Total | ​ | $ | 168.5 | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | 0.1 | ​ | $ | 168.6
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Reinsurance recoverable and deposit receivable |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | $ | 20,614.9
(1) | Represents unallocated basis adjustments related to fair value hedges utilizing the portfolio layer method. See Note 5, Derivative Financial Instruments, for further details.
Non-Accrual Financing Receivables (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024
​ |  | ​ |  |  | ​ |  |  | Amortized cost
​ | ​ | Beginning | ​ | Ending | ​ | of nonaccrual
​ | ​ | amortized cost | ​ | amortized cost | ​ | assets without
​ | ​ | on nonaccrual | ​ | on nonaccrual | ​ | a valuation
​ | ​ | status | ​ | status | ​ | allowance
​ |  | (in millions)
Commercial mortgage loans | ​ | $ | 58.4 | ​ | $ | 70.5 | ​ | $ | —
Residential mortgage loans | ​ | ​ | 10.2 | ​ | ​ | 15.6 | ​ | ​ | —
Total | ​ | $ | 68.6 | ​ | $ | 86.1 | ​ | $ | —
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023
​ |  | ​ |  |  | ​ |  |  | Amortized cost
​ | ​ | Beginning | ​ | Ending | ​ | of nonaccrual
​ | ​ | amortized cost | ​ | amortized cost | ​ | assets without
​ | ​ | on nonaccrual | ​ | on nonaccrual | ​ | a valuation
​ | ​ | status | ​ | status | ​ | allowance
​ |  | (in millions)
Commercial mortgage loans | ​ | $ | 50.0 | ​ | $ | 58.4 | ​ | $ | —
Residential mortgage loans | ​ | ​ | 17.8 | ​ | ​ | 10.2 | ​ | ​ | 0.5
Total | ​ | $ | 67.8 | ​ | $ | 68.6 | ​ | $ | 0.5
Schedule of Interest Income Recognized on Non-accrual Financing Receivables (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31,
​ |  | 2024 | ​ | 2023 |  | 2022
​ |  | (in millions)
Commercial mortgage loans | ​ | $ | 0.8 | ​ | $ | 1.2 | ​ | $ | 0.9
Residential mortgage loans | ​ | ​ | 0.1 | ​ | ​ | — | ​ | ​ | —
Total | ​ | $ | 0.9 | ​ | $ | 1.2 | ​ | $ | 0.9
Financing Receivables Aging (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | December 31, 2024 | ​
​ |  | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Amortized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 days or | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 days or | ​
​ | ​ | 30-59 days | ​ | 60-89 days | ​ | more past | ​ | Total past | ​ | ​ | ​ | ​ | ​ | ​ | ​ | more and | ​
​ |  | past due |  | past due |  | due |  | due |  | Current |  | Total (1) |  | accruing |
​ | ​ | (in millions) | ​
Commercial mortgage loans | ​ | $ | 70.3 | ​ | $ | 2.2 | ​ | $ | 26.3 | ​ | $ | 98.8 | ​ | $ | 16,973.9 | ​ | $ | 17,072.7 | ​ | $ | — | ​
Direct financing leases | ​ | ​ | 3.6 | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 3.6 | ​ | ​ | 559.4 | ​ | ​ | 563.0 | ​ | ​ | — | ​
Residential mortgage loans (2) | ​ | ​ | 54.4 | ​ | ​ | 14.9 | ​ | ​ | 23.5 | ​ | ​ | 92.8 | ​ | ​ | 3,523.0 | ​ | ​ | 3,615.8 | ​ | ​ | 9.5 | ​
Other loans | ​ | ​ | 2.1 | ​ | ​ | 1.8 | ​ | ​ | 1.6 | ​ | ​ | 5.5 | ​ | ​ | 140.8 | ​ | ​ | 146.3 | ​ | ​ | 1.4 | ​
Total | ​ | $ | 130.4 | ​ | $ | 18.9 | ​ | $ | 51.4 | ​ | $ | 200.7 | ​ | $ | 21,197.1 | ​ | $ | 21,397.8 | ​ | $ | 10.9 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2023 | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Amortized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | cost | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 days or | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | 90 days or | ​
​ | ​ | 30-59 days | ​ | 60-89 days | ​ | more past | ​ | Total past | ​ | ​ | ​ | ​ | ​ | ​ | ​ | more and | ​
​ |  | past due |  | past due |  | due |  | due |  | Current |  | Total (1) |  | accruing |
​ | ​ | (in millions) | ​
Commercial mortgage loans | ​ | $ | 7.8 | ​ | $ | 0.8 | ​ | $ | 12.5 | ​ | $ | 21.1 | ​ | $ | 16,560.7 | ​ | $ | 16,581.8 | ​ | $ | — | ​
Direct financing leases | ​ | ​ | — | ​ | ​ | 4.1 | ​ | ​ | — | ​ | ​ | 4.1 | ​ | ​ | 646.0 | ​ | ​ | 650.1 | ​ | ​ | — | ​
Residential mortgage loans | ​ | ​ | 46.0 | ​ | ​ | 15.6 | ​ | ​ | 16.4 | ​ | ​ | 78.0 | ​ | ​ | 3,618.5 | ​ | ​ | 3,696.5 | ​ | ​ | 7.7 | ​
Other loans | ​ | ​ | 1.0 | ​ | ​ | 0.5 | ​ | ​ | 0.7 | ​ | ​ | 2.2 | ​ | ​ | 166.4 | ​ | ​ | 168.6 | ​ | ​ | 0.6 | ​
Total | ​ | $ | 54.8 | ​ | $ | 21.0 | ​ | $ | 29.6 | ​ | $ | 105.4 | ​ | $ | 20,991.6 | ​ | $ | 21,097.0 | ​ | $ | 8.3 | ​
(1) | As of both December 31, 2024 and December 31, 2023, no reinsurance recoverables or deposit receivables were considered past due.
(2) | Excludes unallocated basis adjustments related to fair value hedges utilizing the portfolio layer method.
Financing Receivables Valuation Allowance (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2024
​ | ​ | ​ | ​ | ​ | Direct | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Commercial | ​ | financing | ​ | Residential | ​ | Reinsurance | ​ | ​ | ​
​ |  | mortgage loans |  | leases |  | mortgage loans |  | recoverables |  | Total
​ |  | ​ | (in millions)
Beginning balance | ​ | $ | 128.8 | ​ | $ | 0.9 | ​ | $ | 6.7 | ​ | $ | 3.2 | ​ | $ | 139.6
Provision | ​ | ​ | 111.5 | ​ | ​ | 2.4 | ​ | ​ | — | ​ | ​ | 0.1 | ​ | ​ | 114.0
Charge-offs | ​ | ​ | (51.4) | ​ | ​ | — | ​ | ​ | (0.2) | ​ | ​ | — | ​ | ​ | (51.6)
Recoveries | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 0.9 | ​ | ​ | — | ​ | ​ | 0.9
Foreign currency translation adjustment | ​ | ​ | (0.3) | ​ | ​ | (0.3) | ​ | ​ | (0.1) | ​ | ​ | — | ​ | ​ | (0.7)
Ending balance | ​ | $ | 188.6 | ​ | $ | 3.0 | ​ | $ | 7.3 | ​ | $ | 3.3 | ​ | $ | 202.2
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2023
​ | ​ | ​ | ​ | ​ | Direct | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Commercial | ​ | financing | ​ | Residential | ​ | Reinsurance | ​ | ​ | ​
​ |  | mortgage loans |  | leases |  | mortgage loans |  | recoverables |  | Total
​ |  | ​ | (in millions)
Beginning balance | ​ | $ | 77.9 | ​ | $ | 0.6 | ​ | $ | 5.6 | ​ | $ | 2.7 | ​ | $ | 86.8
Provision | ​ | ​ | 51.0 | ​ | ​ | 0.3 | ​ | ​ | 0.1 | ​ | ​ | 0.5 | ​ | ​ | 51.9
Charge-offs | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.4) | ​ | ​ | — | ​ | ​ | (0.4)
Recoveries | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 1.4 | ​ | ​ | — | ​ | ​ | 1.4
Foreign currency translation adjustment | ​ | ​ | (0.1) | ​ | ​ | — | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.1)
Ending balance | ​ | $ | 128.8 | ​ | $ | 0.9 | ​ | $ | 6.7 | ​ | $ | 3.2 | ​ | $ | 139.6
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2022
​ | ​ | ​ | ​ | ​ | Direct | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Commercial | ​ | financing | ​ | Residential | ​ | Reinsurance | ​ | ​ | ​
​ |  | mortgage loans |  | leases |  | mortgage loans |  | recoverables |  | Total
​ |  | ​ | (in millions)
Beginning balance | ​ | $ | 43.9 | ​ | $ | 0.4 | ​ | $ | 2.0 | ​ | $ | 2.7 | ​ | $ | 49.0
Provision | ​ | ​ | 34.0 | ​ | ​ | 0.2 | ​ | ​ | 1.5 | ​ | ​ | — | ​ | ​ | 35.7
Charge-offs | ​ | ​ | — | ​ | ​ | — | ​ | ​ | (0.2) | ​ | ​ | — | ​ | ​ | (0.2)
Recoveries | ​ | ​ | — | ​ | ​ | — | ​ | ​ | 2.3 | ​ | ​ | — | ​ | ​ | 2.3
Ending balance | ​ | $ | 77.9 | ​ | $ | 0.6 | ​ | $ | 5.6 | ​ | $ | 2.7 | ​ | $ | 86.8
Mortgage Loans Purchased and Sold (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31,
​ |  | 2024 |  | 2023 |  | 2022
​ | ​ | (in millions)
Commercial mortgage loans: | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
Purchased | ​ | $ | 126.7 | ​ | $ | 109.2 | ​ | $ | 325.4
Sold | ​ |  | 148.1 | ​ |  | 12.1 | ​ |  | 15.6
Residential mortgage loans: | ​ |  |  | ​ |  |  | ​ |  |
Purchased (1) | ​ |  | 382.6 | ​ |  | 554.7 | ​ |  | 1,846.0
Sold | ​ |  | 29.1 | ​ |  | 115.9 | ​ |  | 535.7
(1) | Includes mortgage loans purchased by residential mortgage loan VIEs in 2023 and 2022.
Commercial Mortgage Loans by Geographic Distribution and Property Type Distribution (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, 2024 | ​ | December 31, 2023 |
​ | ​ | Amortized | ​ | Percent | ​ | Amortized | ​ | Percent |
​ |  | cost |  | of total |  | cost |  | of total |
​ | ​ | ($ in millions) |
Geographic distribution | ​ | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​
New England | ​ | $ | 347.2 |  | 2.0 | % | $ | 366.5 |  | 2.2 | %
Middle Atlantic | ​ |  | 4,714.9 |  | 27.7 | ​ |  | 4,512.6 |  | 27.1 | ​
East North Central | ​ |  | 591.0 |  | 3.5 | ​ |  | 583.3 |  | 3.5 | ​
West North Central | ​ |  | 394.0 |  | 2.3 | ​ |  | 336.0 |  | 2.0 | ​
South Atlantic | ​ |  | 2,987.7 |  | 17.5 | ​ |  | 2,761.9 |  | 16.7 | ​
East South Central | ​ |  | 417.7 |  | 2.4 | ​ |  | 429.4 |  | 2.6 | ​
West South Central | ​ |  | 1,310.5 |  | 7.7 | ​ |  | 1,268.6 |  | 7.7 | ​
Mountain | ​ |  | 979.5 |  | 5.7 | ​ |  | 824.2 |  | 5.0 | ​
Pacific | ​ |  | 4,851.9 |  | 28.4 | ​ |  | 4,974.4 |  | 30.0 | ​
International | ​ |  | 478.3 |  | 2.8 | ​ |  | 524.9 |  | 3.2 | ​
Total | ​ | $ | 17,072.7 |  | 100.0 | % | $ | 16,581.8 |  | 100.0 | %
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Property type distribution | ​ |  | ​ |  | ​ | ​ |  | ​ |  | ​ | ​
Office | ​ | $ | 3,182.9 |  | 18.5 | % | $ | 3,643.0 |  | 21.9 | %
Retail | ​ |  | 1,476.9 |  | 8.7 | ​ |  | 1,454.7 |  | 8.8 | ​
Industrial | ​ |  | 4,364.5 |  | 25.6 | ​ |  | 3,515.7 |  | 21.2 | ​
Apartments | ​ |  | 7,220.4 |  | 42.3 | ​ |  | 7,128.2 |  | 43.0 | ​
Hotel | ​ |  | 65.0 |  | 0.4 | ​ |  | 68.6 |  | 0.4 | ​
Mixed use/other | ​ |  | 763.0 |  | 4.5 | ​ |  | 771.6 |  | 4.7 | ​
Total | ​ | $ | 17,072.7 |  | 100.0 | % | $ | 16,581.8 |  | 100.0 | %
Mortgage Loans Modified as a Troubled Debt Restructuring (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, 2022
​ |  | TDRs |  | TDRs in payment default
​ |  | Number of |  | Recorded | ​ | Number of | ​ | Recorded
​ |  | contracts |  | investment |  | contracts |  | investment
​ | ​ | ​ | ​ | ​ | (in millions) | ​ | ​ |  | ​ | (in millions)
Commercial mortgage loans | ​ | 1 | ​ | $ | 35.5 | ​ | — | ​ | $ | —
Total | ​ | 1 | ​ | $ | 35.5 | ​ | — | ​ | $ | —
​
Minority Interests in Unconsolidated Entities-Balance Sheet (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, | ​
​ |  | 2024 |  | 2023 | ​
​ | ​ | (in millions) | ​
Total assets | ​ | $ | 222,907.6 | ​ | $ | 215,978.7 | ​
Total liabilities | ​ | ​ | 87,104.7 | ​ | ​ | 100,865.3 | ​
Total equity | ​ | $ | 135,802.9 | ​ | $ | 115,113.4 | ​
Net investment in unconsolidated entities (1) | ​ | $ | 3,965.7 | ​ | $ | 3,488.7 | ​
Minority Interests in Unconsolidated Entities-Income Statement (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | For the year ended December 31, | ​
​ |  | 2024 |  | 2023 |  | 2022 | ​
​ | ​ | (in millions) | ​
Total revenues | ​ | $ | 22,609.3 | ​ | $ | 12,449.3 | ​ | $ | 44,974.8 | ​
Net income (loss) | ​ | ​ | 9,765.6 | ​ | ​ | (2,674.2) | ​ | ​ | 34,322.7 | ​
Our share of net income of unconsolidated entities (1) | ​ | ​ | 305.1 | ​ | ​ | 314.9 | ​ | ​ | 302.2 | ​
(1) | Our most significant equity investee is Brasilprev Seguros e Previdencia, a co-managed joint venture in Brazil.
Financial Assets Subject to Netting Agreements (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross amounts not offset in the | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | consolidated statements | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | of financial position | ​ | ​ | ​ | ​
​ |  | Gross amount |  | ​ | ​ | ​ | ​ | ​ |  |  | ​ | ​
​ | ​ | of recognized | ​ | Financial | ​ | Collateral | ​ | ​ | ​
​ |  | assets (1) |  | instruments (2) |  | received |  | Net amount |
​ | ​ | (in millions) | ​
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative assets | ​ | $ | 648.2 | ​ | $ | (254.8) | ​ | $ | (392.1) | ​ | $ | 1.3 | ​
Reverse repurchase agreements | ​ | ​ | 120.4 | ​ | ​ | — | ​ | ​ | (120.4) | ​ | ​ | — | ​
Total | ​ | $ | 768.6 | ​ | $ | (254.8) | ​ | $ | (512.5) | ​ | $ | 1.3 | ​
December 31, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative assets | ​ | $ | 304.0 | ​ | $ | (178.5) | ​ | $ | (116.7) | ​ | $ | 8.8 | ​
Reverse repurchase agreements | ​ | ​ | 145.1 | ​ | ​ | — | ​ | ​ | (145.1) | ​ | ​ | — | ​
Total | ​ | $ | 449.1 | ​ | $ | (178.5) | ​ | $ | (261.8) | ​ | $ | 8.8 | ​
(1) | The gross amount of recognized derivative and reverse repurchase agreement assets are reported with other investments and cash and cash equivalents, respectively, on the consolidated statements of financial position. The gross amounts of derivative and reverse repurchase agreement assets are not netted against offsetting liabilities for presentation on the consolidated statements of financial position.
(2) | Represents amount of offsetting derivative liabilities that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative assets for presentation on the consolidated statements of financial position.
Financial Liabilities Subject to Netting Agreements (Table) | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Gross amounts not offset in the | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | consolidated statements | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | of financial position | ​ | ​ | ​ | ​
​ |  | Gross amount | ​ |  | ​ |  |  | ​ | ​ |  | ​ | ​
​ | ​ | of recognized | ​ | Financial | ​ | Collateral | ​ | ​ | ​ | ​
​ |  | liabilities (1) |  | instruments (2) |  | pledged |  | Net amount |
​ | ​ | (in millions) | ​
December 31, 2024 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative liabilities | ​ | $ | 506.0 | ​ | $ | (254.8) | ​ | $ | (239.4) | ​ | $ | 11.8 | ​
December 31, 2023 | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Derivative liabilities | ​ | $ | 494.0 | ​ | $ | (178.5) | ​ | $ | (301.1) | ​ | $ | 14.4 | ​
(1) | The gross amount of recognized derivative liabilities is reported with other liabilities on the consolidated statements of financial position. The above excludes derivative liabilities, which are primarily embedded derivatives that are not subject to master netting agreements or similar agreements. The gross amounts of derivative liabilities are not netted against offsetting assets for presentation on the consolidated statements of financial position.
(2) | Represents amount of offsetting derivative assets that are subject to an enforceable master netting agreement or similar agreement that are not netted against the gross derivative liabilities for presentation on the consolidated statements of financial position.

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